nomadseason

October Weather in Santiago, Costa Rica

Last updated: August 23, 2025

In October, the average temperature in Santiago, Costa Rica is a pleasant 21°C (70°F), with a minimum of 17°C (63°F) and soaring up to a maximum of 28°C (82°F). Visitors should prepare for a wet experience, as the region receives about 873 mm (34.4 in) of precipitation over the course of 30 days. With an average humidity level of 80%, be ready for a warm and humid environment!

October Temperature in Santiago

In October in Santiago, the average temperature is 21°C (70°F). Maximums can reach 28°C (82°F), while minimums can be as low as 17°C (63°F). This pleasant climate makes it an ideal time for outdoor activities and exploring the beauty of Santiago.

October Weather in Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago, October typically has an average temperature of 21°C (70°F), with highs reaching up to 28°C (82°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec707172727272717171707070
Data source: Temperature data for Santiago generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Santiago

In Santiago in October, the precipitation amount is 873 mm (34.4 in) during 30 days, indicating a significant level of rainfall for that period.

October Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Santiago, October typically receives around 873 mm (34.4 inches) of precipitation spread over approximately 30 days.
JanFebMarAprMayJunJulAugSepOctNovDec1166574253706651683762853873503253
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Santiago

In Santiago in October humidity is 80%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can make even short walks feel draining, urging travelers to seek shade or a cool drink frequently.

October Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Santiago is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%68%66%67%69%84%85%82%81%80%80%73%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Santiago

In Santiago in October, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Santiago.

Maximum UV Index Levels in Santiago for October

The chart shows the monthly maximum UV Index (UVI) for Santiago in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Santiago typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111314141514141313131110
Data source: Santiago October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How October Weather in Santiago Compares to Other Months

Weather in Santiago varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Santiago, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Santiago, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (71°F)116 mm (4.6 inches)68%extreme
February Weather22°C (71°F)65 mm (2.5 inches)68%extreme
March Weather22°C (72°F)74 mm (2.9 inches)66%extreme
April Weather22°C (72°F)253 mm (10.0 inches)67%extreme
May Weather22°C (72°F)706 mm (27.8 inches)69%extreme
June Weather22°C (72°F)651 mm (25.6 inches)84%extreme
July Weather22°C (72°F)682 mm (26.9 inches)85%extreme
August Weather22°C (71°F)762 mm (30.0 inches)82%extreme
September Weather21°C (71°F)853 mm (33.6 inches)81%extreme
October Weather21°C (70°F)873 mm (34.4 inches)80%extreme
November Weather21°C (71°F)503 mm (19.8 inches)80%extreme
December Weather21°C (71°F)253 mm (10.0 inches)72%very high

Compare Santiago's Climate with Cities Worldwide